Back-Azimuth Estimation of Air-to-Ground Coupled Infrasound from Transverse Coherence Minimization-Reference-Cited by-同舟云学术

Back-Azimuth Estimation of Air-to-Ground Coupled Infrasound from Transverse Coherence Minimization

Published:2023-10-01 Issue:4 Volume:3 Page:249-258
ISSN:2694-4006
Container-title:The Seismic Record
language:en
Short-container-title:

Author:

Bishop Jordan W.¹²^ORCID,Haney Matthew M.³^ORCID,Fee David¹^ORCID,Matoza Robin S.⁴^ORCID,McKee Kathleen F.⁵^ORCID,Lyons John J.³^ORCID

Affiliation:

1. 1Wilson Alaska Technical Center, Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska, U.S.A.

2. 2Now at, Los Alamos National Laboratory, Los Alamos, New Mexico, U.S.A.

3. 3U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, Alaska, U.S.A.

4. 4Department of Earth Science and Earth Research Institute, University of California, Santa Barbara, California, U.S.A.

5. 5Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, U.S.A.

Abstract

AbstractWe present the transverse coherence minimization method (TCM)—an approach to estimate the back-azimuth of infrasound signals that are recorded on an infrasound microphone and a colocated three-component seismometer. Accurate back-azimuth information is important for a variety of monitoring efforts, but it is currently only available for infrasound arrays and for seismoacoustic sensor pairs separated by 10 s of meters. Our TCM method allows for the analysis of colocated sensor pairs, sensors located within a few meters of each other, which may extend the capabilities of existing seismoacoustic networks and supplement operating infrasound arrays. This approach minimizes the coherence of the transverse component of seismic displacement with the infrasound wave to estimate the infrasound back-azimuth. After developing an analytical model, we investigate seismoacoustic signals from the August 2012 Humming Roadrunner experiment and the 26 May 2021 eruption of Great Sitkin Volcano, Alaska, U.S.A., at the ranges of 6.5–185 km from the source. We discuss back-azimuth estimates and potential sources of deviation (1°–15°), such as local terrain effects or deviation from common analytical models. This practical method complements existing seismoacoustic tools and may be suitable for routine application to signals of interest.

Publisher

Seismological Society of America (SSA)

Subject

General Chemical Engineering

Link

https://pubs.geoscienceworld.org/ssa/tsr/article-pdf/3/4/249/5979003/tsr-2023023.1.pdf

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